Pressure-induced phase transition and octahedral tilt system change of Ba2BiSbO6

Michael W. Lufaso, René B. MacQuart, Yongjae Lee, Thomas Vogt, Hans Conrad Zur Loye

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Abstract

High-resolution X-ray synchrotron powder diffraction studies under high-pressure conditions are reported for the ordered double perovskite Ba 2BiSbO6. Near 4 GPa, the oxide undergoes a pressure-induced phase transition. The symmetry of the material changes during the phase transition from space group R3̄ to space group I2/m, which is consistent with a change in the octahedral tilting distortion from an a -a-a- type to a0b-b - type using the Glazer notation. A fit of the volume-pressure data using the Birch-Murnagaham equation of state yielded a bulk modulus of 144(8) GPa for the rhombohedral phase.

Original languageEnglish
Pages (from-to)917-922
Number of pages6
JournalJournal of Solid State Chemistry
Volume179
Issue number3
DOIs
Publication statusPublished - 2006 Mar 1

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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